appeared on my dash last night right before pulling in my driveway. I checked the oil and had none on my stick. 2500 miles on the truck at this point. It's at the shop, so I'll see what they come up with tomorrow. Anyone else experienced this? At this point, it's either burning it, there's a leak, or they didn't give it a good inspection before I picked it up.
2021 LT TB 6.2L, Engine OIl Low, Add Oil message
- Thread starter NorHawk
- Start date
Trail Brian
Active member
ran my 6.2 from seattle to halfway down the baja averaging 80 to 90 115 degrees out and needed 1/4 qt
If you lost like 3 quarts of oil, you'd see the leak...
If you burned the same amount, you'd see blue smoke out the exhaust.
If a head gasket popped and oil was getting into the cooling system, you'd see that extra 3 quarts of contaminated crud leaking out.
If coolant was also getting into the oil, you'd see a milkshake on the dipstick even if the engine was low on oil.
If you added a couple-3 quarts and topped it off, then you could gauge whether it was an actual issue or just under-filled at the factory.
The dealer won't be able to do a thing, barring observing the first 4 issues, none of which are likely, or they'd be obvious.
2500mi, I'd change the oil anyway. And then get a baseline for the issue, if there is one.
The truck was driven to the dealership from another dealership 175 miles away. My dealership admitted to not inspecting the vehicle because they assumed the dealership it came from did, so they didn't check it at all. I had them change the oil and we'll go from here. I hope no damage was done, but I'll find out the hard way I'm sure. Thanks for the responses
I'd say rest easy. 1,000,000s of larger motors than the little LS mouse motors in our trucks have run off of a total oil capacity of 5 quarts for a long time.
And the oil pump sump in the LS I've seen apart was pretty close to the bottom of the pan. Moreso, I think many of these larger oil capacities on newer engines are more than partly to allow longer OCI's. If it's not ticking or knocking, nothing got oil starved.
And the oil pump sump in the LS I've seen apart was pretty close to the bottom of the pan. Moreso, I think many of these larger oil capacities on newer engines are more than partly to allow longer OCI's. If it's not ticking or knocking, nothing got oil starved.
Trail Brian
Active member
check your truck when you get it back …. they assumed once already and was wrong ….. also see what oil they put in …..
good luck I agree with previous member …. your good
good luck I agree with previous member …. your good
Imhungarian
New member
Hi NorHawk I have a 2021 Denali XL, I purchased new and presently has about 25000 miles on it. About 4 months ago I returned home from a 600 mile trip each way and discovered my oil level was down about 2 1/2 quarts. most of that trip was 70 to 85 mph (Montana). It probably wasn't the oil servicing company I have used for 34 years. Took it to dealership and they found nothing. Serviced it and checked oil regularly. No drips in garage, no blue tailpipe or smoke. I am meticulous about my vehicles. Two weeks ago we took an 800 mile trip, each way, once again, higher speeds, 70 to 85 mph. When I returned and checked the oil, I had to add a quart, which barely brought it up to the bottom of the fill line. Took it in for a service, and checked it...and it us full. Now I am taking pictures of mileage and dipstick readings Have an appt with dealership again, but that is 3 weeks out. Have you heard any other news re oil usage? a retired good friend of mine, a mechanic, said I should not ne experiencing this issue. BTW it is also a 6.2
I haven’t had an issue since what I experienced. Very strange occurrence for your vehicle and obviously something is not right. Keep us posted
mrcolieman
Well-known member
No engine has a perfect seal from piston to cylinder wall. The oil is supposed to lubricate these surfaces after all, or the engine would seize up. Oil consumption, on some level, happens in every engine. With AFM/DFM more consumption of oil is considered normal and here is why. On a normal intake stroke (piston moving down and intake valve open) the vacuum created draws the air from the intake manifold into the cylinder to mix with the directly injected fuel for the compression stroke. When AFM/DFM is active, the piston is moving downward creating tremendous vacuum with both the intake and exhaust valves closed on that cylinder. Some oil (and air) from the crankcase is pulled up past the piston rings and hangs out in the cylinder until AFM/DFM is deactivated, at which time it exits out the exhaust (burned or not). Interesting note. The Dodge and Ford guys have similar issues/complaints with those brands version of the same technology on their forums.
Up to 1qt of oil per 100 gallons of fuel (2,000mi) is considered "normal oil usage". Sounds a bit crazy... Check and change your oil early and often with good quality, and manufacturer recommended oil my friends!
Up to 1qt of oil per 100 gallons of fuel (2,000mi) is considered "normal oil usage". Sounds a bit crazy... Check and change your oil early and often with good quality, and manufacturer recommended oil my friends!
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